US4295119A - Rotary variable resistor - Google Patents

Rotary variable resistor Download PDF

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Publication number
US4295119A
US4295119A US06/128,941 US12894180A US4295119A US 4295119 A US4295119 A US 4295119A US 12894180 A US12894180 A US 12894180A US 4295119 A US4295119 A US 4295119A
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US
United States
Prior art keywords
rotor
variable resistor
cover
flange
rotary variable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/128,941
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English (en)
Inventor
Masao Kasashima
Yoshizo Kubo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alps Alpine Co Ltd
Original Assignee
Alps Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Application granted granted Critical
Publication of US4295119A publication Critical patent/US4295119A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C10/00—Adjustable resistors
    • H01C10/30—Adjustable resistors the contact sliding along resistive element
    • H01C10/32—Adjustable resistors the contact sliding along resistive element the contact moving in an arcuate path

Definitions

  • the present invention relates to a rotary variable resistor and, more particularly, to a rotary variable resistor having an improved wiper holder.
  • a rotary variable resistor of this kind is provided with a cover, a substrate carrying a resistance element, and a rotor which has a wiper attached thereto and which is rotatably supported between the cover and substrate, and disclosed in, for example, U.S. Pat. No. 3,387,247.
  • Another object of the present invention is to provide a rotary variable resistor having a rotor provided with means integrally formed therewith to obtain a driving torque.
  • Still another object of the present invention is to provide a rotary variable resistor having a rotor which can be rotated smoothly and stably.
  • a further object of the present invention is to provide a rotary variable resistor which has a smaller number of parts and which can be manufactured at a low cost.
  • the present invention provides a rotary variable resistor comprising a cover having an opening, a substrate secured to the opening of the cover and carrying a resistance element and terminals, and a rotor of a synthetic resin which is rotatably supported between the cover and the substrate.
  • the rotor is provided with a recess for holding an upwardly extended shaft, and a wiper is held to the lower surface of the rotor.
  • An elastic flange is formed on the peripheral portion of the lower end of the rotor, and legs project downwardly from the flange and are slidable on the substrate. In this way, the rotor is elastically held between the cover and substrate owing to the elasticity of the flange.
  • FIG. 1 is a perspective view of a rotary variable resistor embodying the present invention
  • FIG. 2 is a side elevational view of the embodiment shown in FIG. 1;
  • FIG. 3 is a perspective view of a rotor in the embodiment shown in FIG. 1;
  • FIG. 4 is a bottom plan view of the rotor shown in FIG. 3;
  • FIG. 5 is a side elevational view partially in cross section of the embodiment shown in FIG. 1.
  • reference numeral 1 denotes an insulating substrate having a resistor and a current collector formed on the upper surface thereof by suitable means such as printing
  • reference numeral 2 denotes a substantially cylindrical metal cover fixed to the insulating substrate 1 by mounting legs 2b
  • reference numeral 2a denotes projection provided on the cover 2 so as to support a control shaft 4 which will be described later.
  • Reference numeral 5h denotes a shaft of a wiper holder 5 which will be described later, the shaft 5h being passed through and projected from the insulating substrate 1 as clearly shown in FIG. 2.
  • Reference numeral 10 denotes terminals fixed to the insulating substrate 1 by suitable means such as caulking, and connected to the resistor and current collector mentioned above.
  • Reference numerals 2c, 2c denote wings integrally formed with the cover 2, and reference numeral 2d mounting legs which are also integrally formed with the cover 2 and which are bent such that the mounting legs 2d have a predetermined elastic force whereby they can be snapfitted into another part.
  • the cover 2 has an opening 11 between the two mounting legs 2d and two wings 2c, 2c, the opening 11 serving as a window from which the terminals 10 protrude.
  • FIG. 3 shows a rotor 3 integrally made of an insulating synthetic resin and provided with a control shaft 4 adopted project outwardly from the cover 2, and a substantially cylindrical wiper holder 5.
  • Reference numeral 4a denotes a serrated portion of the control shaft 4; reference numeral 4b denotes a larger diameter portion of the control shaft 4, rotatably supported by the above-mentioned projection 2a; reference numeral 5a denotes an annular shoulder portion of the wiper holder 5, engageable with the lower surface of an upper portion of the cover 2 (refer to FIG. 5); reference numeral 5b denotes a main portion of the wiper holder 5; and reference numeral 5c denotes a projection serving as a stopper provided on the side surface of the main portion 5b and cooperating with a projection 2e (refer to FIG. 5), which is provided at that portion of the cover 2 which defines the above-mentioned opening 11, so as to restrict the amount of rotation of the rotor 3.
  • Reference numeral 5d denotes a thin, circular flange provided at the lower end of the circumferential surface of the main portion 5b of the wiper holder 5 and integrally formed with the main portion 5b via a plurality of retainer portions 5e
  • reference numeral 6 denotes arcuate grooves provided in the flange 5d so as to furnish the flange 5d with a suitable elasticity.
  • Reference numerals 5f . . . denote wiper legs formed integrally with a lower portion of the flange 5d and adapted to elastically contact the insulating substrate 1 (refer to FIG. 5).
  • reference numeral 5g denotes a larger diameter hub portion provided in the central part of a recess in the wiper holder 5; reference numeral 5h denotes the above-mentioned shaft of the wiper holder 5, passed through the insulating substrate 1.
  • a wiper 7 consists of an elastic metal plate fastened to the periphery of the hub portion 5g by suitable means such as fusing or caulking, and is adapted to resiliently slide on the resistor and current collector.
  • FIG. 5 is a side elevational view partially in cross section of an embodiment of the present invention in an assembled state in which a rotor 3 with a wiper 7 attached thereto is housed in a cover 2.
  • a plurality of wiper legs 5f . . . provided at the lower end of the flange 5d resiliently contact the upper surface of the insulating substrate 1, to thereby serve as a guide for a wiper holder 5 (rotor 3) during rotational movement of the wiper holder 5.
  • the flange 5d contacts the insulating substrate 1 as the former is deformed in the upward direction.
  • a shoulder portion 5a of the wiper holder 5 is pressed against the lower surface of an upper portion of the cover 2 so that the wiper holder 5 is supported between the cover 2 and insulating substrate 1 such that a suitable elastic force is constantly applied to the wiper holder 5.
  • variable resistor shown in the accompanying drawings is an embodiment of the present invention, and an improved wiper holder employed therein may, of course, be applied to various kinds of rotary variable resistors. If a wiper 7 and a resistor corresponding thereto are arranged within a wiper holder 5, a gap between the flange portion 5d and the upper surface of a substrate becomes extremely small. In such a case, the variable resistor has a sufficient dustproofing effect even if mounting legs 2d are provided in the above-described manner to necessarily form an opening in a cover 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Adjustable Resistors (AREA)
US06/128,941 1979-03-12 1980-03-10 Rotary variable resistor Expired - Lifetime US4295119A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1979031478U JPS5855616Y2 (ja) 1979-03-12 1979-03-12 回転形可変抵抗器
JP54-31478[U] 1979-03-12

Publications (1)

Publication Number Publication Date
US4295119A true US4295119A (en) 1981-10-13

Family

ID=12332365

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/128,941 Expired - Lifetime US4295119A (en) 1979-03-12 1980-03-10 Rotary variable resistor

Country Status (4)

Country Link
US (1) US4295119A (pt)
JP (1) JPS5855616Y2 (pt)
BR (1) BR6000251U (pt)
DE (1) DE3007291A1 (pt)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5278729A (en) * 1992-04-10 1994-01-11 Magnavox Electronic Systems Company Compact rotatable electrical device
US5376913A (en) * 1993-07-12 1994-12-27 Motorola, Inc. Variable resistor utilizing an elastomeric actuator
US5889461A (en) * 1996-11-20 1999-03-30 Alps Electric Co., Ltd. Structure for mounting an operating member of an electrical part to an operating shaft
US20060176144A1 (en) * 2005-02-09 2006-08-10 Honda Motor Co., Ltd. Rotary variable resistor
CN109741892A (zh) * 2019-01-29 2019-05-10 安徽功率电气有限公司 一种列车棘车专用电位器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3387247A (en) * 1966-02-28 1968-06-04 Beckman Instruments Inc Housing and base construction for variable resistance device
US3389364A (en) * 1966-03-07 1968-06-18 Cts Corp Electrical control having a nonceramic base and ceramic substrate supported cermet resistance film supported thereon
US3456227A (en) * 1965-11-02 1969-07-15 Spectrol Electronics Corp Variable resistor
US3531753A (en) * 1969-03-17 1970-09-29 Bourns Inc Variable resistor contact device
US3601743A (en) * 1969-10-01 1971-08-24 Electra Midland Corp Miniaturized single turn potentiometer with hermetically sealed rotor and substrate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3456227A (en) * 1965-11-02 1969-07-15 Spectrol Electronics Corp Variable resistor
US3387247A (en) * 1966-02-28 1968-06-04 Beckman Instruments Inc Housing and base construction for variable resistance device
US3389364A (en) * 1966-03-07 1968-06-18 Cts Corp Electrical control having a nonceramic base and ceramic substrate supported cermet resistance film supported thereon
US3531753A (en) * 1969-03-17 1970-09-29 Bourns Inc Variable resistor contact device
US3601743A (en) * 1969-10-01 1971-08-24 Electra Midland Corp Miniaturized single turn potentiometer with hermetically sealed rotor and substrate

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5278729A (en) * 1992-04-10 1994-01-11 Magnavox Electronic Systems Company Compact rotatable electrical device
US5376913A (en) * 1993-07-12 1994-12-27 Motorola, Inc. Variable resistor utilizing an elastomeric actuator
US5889461A (en) * 1996-11-20 1999-03-30 Alps Electric Co., Ltd. Structure for mounting an operating member of an electrical part to an operating shaft
US20060176144A1 (en) * 2005-02-09 2006-08-10 Honda Motor Co., Ltd. Rotary variable resistor
US7746214B2 (en) 2005-02-09 2010-06-29 Honda Motor Co., Ltd. Rotary variable resistor
CN109741892A (zh) * 2019-01-29 2019-05-10 安徽功率电气有限公司 一种列车棘车专用电位器
CN109741892B (zh) * 2019-01-29 2021-03-02 安徽功率电气有限公司 一种列车棘车专用电位器

Also Published As

Publication number Publication date
JPS55132904U (pt) 1980-09-20
DE3007291A1 (de) 1980-09-25
JPS5855616Y2 (ja) 1983-12-20
BR6000251U (pt) 1980-11-11

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